<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-event-notify.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Event module for sending notification emails


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
    header('Location: ../');
    exit;
}


class qa_event_notify
{

    function process_event($event, $userid, $handle, $cookieid, $params)
    {
        require_once QA_INCLUDE_DIR . 'qa-app-emails.php';
        require_once QA_INCLUDE_DIR . 'qa-app-format.php';
        require_once QA_INCLUDE_DIR . 'qa-util-string.php';


        switch ($event) {
            case 'q_post':
                $followanswer = @$params['followanswer'];
                $sendhandle = isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] : qa_lang('main/anonymous'));

                if (isset($followanswer['notify']) && !qa_post_is_by_user($followanswer, $userid, $cookieid)) {
                    $blockwordspreg = qa_get_block_words_preg();
                    $sendtext = qa_viewer_text($followanswer['content'], $followanswer['format'], array('blockwordspreg' => $blockwordspreg));

                    qa_send_notification($followanswer['userid'], $followanswer['notify'], @$followanswer['handle'], qa_lang('emails/a_followed_subject'), qa_lang('emails/a_followed_body'), array(
                        '^q_handle' => $sendhandle,
                        '^q_title' => qa_block_words_replace($params['title'], $blockwordspreg),
                        '^a_content' => $sendtext,
                        '^url' => qa_q_path($params['postid'], $params['title'], true),
                    ));
                }

                if (qa_opt('notify_admin_q_post'))
                    qa_send_notification(null, qa_opt('feedback_email'), null, qa_lang('emails/q_posted_subject'), qa_lang('emails/q_posted_body'), array(
                        '^q_handle' => $sendhandle,
                        '^q_title' => $params['title'], // don't censor title or content here since we want the admin to see bad words
                        '^q_content' => $params['text'],
                        '^url' => qa_q_path($params['postid'], $params['title'], true),
                    ));

                break;


            case 'a_post':
                $question = $params['parent'];

                if (isset($question['notify']) && !qa_post_is_by_user($question, $userid, $cookieid))
                    qa_send_notification($question['userid'], $question['notify'], @$question['handle'], qa_lang('emails/q_answered_subject'), qa_lang('emails/q_answered_body'), array(
                        '^a_handle' => isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] : qa_lang('main/anonymous')),
                        '^q_title' => $question['title'],
                        '^a_content' => qa_block_words_replace($params['text'], qa_get_block_words_preg()),
                        '^url' => qa_q_path($question['postid'], $question['title'], true, 'A', $params['postid']),
                    ));
                break;


            case 'c_post':
                $parent = $params['parent'];
                $question = $params['question'];

                $senttoemail = array(); // to ensure each user or email gets only one notification about an added comment
                $senttouserid = array();

                switch ($parent['basetype']) {
                    case 'Q':
                        $subject = qa_lang('emails/q_commented_subject');
                        $body = qa_lang('emails/q_commented_body');
                        $context = $parent['title'];
                        break;

                    case 'A':
                        $subject = qa_lang('emails/a_commented_subject');
                        $body = qa_lang('emails/a_commented_body');
                        $context = qa_viewer_text($parent['content'], $parent['format']);
                        break;
                }

                $blockwordspreg = qa_get_block_words_preg();
                $sendhandle = isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] : qa_lang('main/anonymous'));
                $sendcontext = qa_block_words_replace($context, $blockwordspreg);
                $sendtext = qa_block_words_replace($params['text'], $blockwordspreg);
                $sendurl = qa_q_path($question['postid'], $question['title'], true, $parent['basetype'], $parent['postid']);

                if (isset($parent['notify']) && !qa_post_is_by_user($parent, $userid, $cookieid)) {
                    $senduserid = $parent['userid'];
                    $sendemail = @$parent['notify'];

                    if (qa_email_validate($sendemail))
                        $senttoemail[$sendemail] = true;
                    elseif (isset($senduserid))
                        $senttouserid[$senduserid] = true;

                    qa_send_notification($senduserid, $sendemail, @$parent['handle'], $subject, $body, array(
                        '^c_handle' => $sendhandle,
                        '^c_context' => $sendcontext,
                        '^c_content' => $sendtext,
                        '^url' => $sendurl,
                    ));
                }

                foreach ($params['thread'] as $comment)
                    if (isset($comment['notify']) && !qa_post_is_by_user($comment, $userid, $cookieid)) {
                        $senduserid = $comment['userid'];
                        $sendemail = @$comment['notify'];

                        if (qa_email_validate($sendemail)) {
                            if (@$senttoemail[$sendemail])
                                continue;

                            $senttoemail[$sendemail] = true;

                        } elseif (isset($senduserid)) {
                            if (@$senttouserid[$senduserid])
                                continue;

                            $senttouserid[$senduserid] = true;
                        }

                        qa_send_notification($senduserid, $sendemail, @$comment['handle'], qa_lang('emails/c_commented_subject'), qa_lang('emails/c_commented_body'), array(
                            '^c_handle' => $sendhandle,
                            '^c_context' => $sendcontext,
                            '^c_content' => $sendtext,
                            '^url' => $sendurl,
                        ));
                    }
                break;


            case 'q_queue':
            case 'q_requeue':
                if (qa_opt('moderate_notify_admin'))
                    qa_send_notification(null, qa_opt('feedback_email'), null,
                        ($event == 'q_requeue') ? qa_lang('emails/remoderate_subject') : qa_lang('emails/moderate_subject'),
                        ($event == 'q_requeue') ? qa_lang('emails/remoderate_body') : qa_lang('emails/moderate_body'),
                        array(
                            '^p_handle' => isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] :
                                (strlen(@$oldquestion['name']) ? $oldquestion['name'] : qa_lang('main/anonymous'))),
                            '^p_context' => trim(@$params['title'] . "\n\n" . $params['text']),
                            '^url' => qa_q_path($params['postid'], $params['title'], true),
                            '^a_url' => qa_path_absolute('admin/moderate'),
                        )
                    );
                break;


            case 'a_queue':
            case 'a_requeue':
                if (qa_opt('moderate_notify_admin'))
                    qa_send_notification(null, qa_opt('feedback_email'), null,
                        ($event == 'a_requeue') ? qa_lang('emails/remoderate_subject') : qa_lang('emails/moderate_subject'),
                        ($event == 'a_requeue') ? qa_lang('emails/remoderate_body') : qa_lang('emails/moderate_body'),
                        array(
                            '^p_handle' => isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] :
                                (strlen(@$oldanswer['name']) ? $oldanswer['name'] : qa_lang('main/anonymous'))),
                            '^p_context' => $params['text'],
                            '^url' => qa_q_path($params['parentid'], $params['parent']['title'], true, 'A', $params['postid']),
                            '^a_url' => qa_path_absolute('admin/moderate'),
                        )
                    );
                break;


            case 'c_queue':
            case 'c_requeue':
                if (qa_opt('moderate_notify_admin'))
                    qa_send_notification(null, qa_opt('feedback_email'), null,
                        ($event == 'c_requeue') ? qa_lang('emails/remoderate_subject') : qa_lang('emails/moderate_subject'),
                        ($event == 'c_requeue') ? qa_lang('emails/remoderate_body') : qa_lang('emails/moderate_body'),
                        array(
                            '^p_handle' => isset($handle) ? $handle : (strlen($params['name']) ? $params['name'] :
                                (strlen(@$oldcomment['name']) ? $oldcomment['name'] : // could also be after answer converted to comment
                                    (strlen(@$oldanswer['name']) ? $oldanswer['name'] : qa_lang('main/anonymous')))),
                            '^p_context' => $params['text'],
                            '^url' => qa_q_path($params['questionid'], $params['question']['title'], true, 'C', $params['postid']),
                            '^a_url' => qa_path_absolute('admin/moderate'),
                        )
                    );
                break;


            case 'q_flag':
            case 'a_flag':
            case 'c_flag':
                $flagcount = $params['flagcount'];
                $oldpost = $params['oldpost'];
                $notifycount = $flagcount - qa_opt('flagging_notify_first');

                if (($notifycount >= 0) && (($notifycount % qa_opt('flagging_notify_every')) == 0))
                    qa_send_notification(null, qa_opt('feedback_email'), null, qa_lang('emails/flagged_subject'), qa_lang('emails/flagged_body'), array(
                        '^p_handle' => isset($oldpost['handle']) ? $oldpost['handle'] :
                            (strlen($oldpost['name']) ? $oldpost['name'] : qa_lang('main/anonymous')),
                        '^flags' => ($flagcount == 1) ? qa_lang_html_sub('main/1_flag', '1', '1') : qa_lang_html_sub('main/x_flags', $flagcount),
                        '^p_context' => trim(@$oldpost['title'] . "\n\n" . qa_viewer_text($oldpost['content'], $oldpost['format'])),
                        '^url' => qa_q_path($params['questionid'], $params['question']['title'], true, $oldpost['basetype'], $oldpost['postid']),
                        '^a_url' => qa_path_absolute('admin/flagged'),
                    ));
                break;


            case 'a_select':
                $answer = $params['answer'];

                if (isset($answer['notify']) && !qa_post_is_by_user($answer, $userid, $cookieid)) {
                    $blockwordspreg = qa_get_block_words_preg();
                    $sendcontent = qa_viewer_text($answer['content'], $answer['format'], array('blockwordspreg' => $blockwordspreg));

                    qa_send_notification($answer['userid'], $answer['notify'], @$answer['handle'], qa_lang('emails/a_selected_subject'), qa_lang('emails/a_selected_body'), array(
                        '^s_handle' => isset($handle) ? $handle : qa_lang('main/anonymous'),
                        '^q_title' => qa_block_words_replace($params['parent']['title'], $blockwordspreg),
                        '^a_content' => $sendcontent,
                        '^url' => qa_q_path($params['parentid'], $params['parent']['title'], true, 'A', $params['postid']),
                    ));
                }
                break;

            case 'u_register':
                if (qa_opt('register_notify_admin'))
                    qa_send_notification(null, qa_opt('feedback_email'), null, qa_lang('emails/u_registered_subject'),
                        qa_opt('moderate_users') ? qa_lang('emails/u_to_approve_body') : qa_lang('emails/u_registered_body'), array(
                            '^u_handle' => $handle,
                            '^url' => qa_path_absolute('user/' . $handle),
                            '^a_url' => qa_path_absolute('admin/approve'),
                        ));
                break;

            case 'u_level':
                if (($params['level'] >= QA_USER_LEVEL_APPROVED) && ($params['oldlevel'] < QA_USER_LEVEL_APPROVED))
                    qa_send_notification($params['userid'], null, $params['handle'], qa_lang('emails/u_approved_subject'), qa_lang('emails/u_approved_body'), array(
                        '^url' => qa_path_absolute('user/' . $params['handle']),
                    ));
                break;

            case 'u_wall_post':
                if ($userid != $params['userid'])
                    qa_send_notification($params['userid'], null, $params['handle'], qa_lang('emails/wall_post_subject'), qa_lang('emails/wall_post_body'), array(
                        '^f_handle' => isset($handle) ? $handle : qa_lang('main/anonymous'),
                        '^post' => $params['text'],
                        '^url' => qa_path_absolute('user/' . $params['handle'], null, 'wall'),
                    ));
                break;
        }
    }

}


/*
	Omit PHP closing tag to help avoid accidental output
*/